Fluid-pressure gage.



Patented Nov. 13, 1917.

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LORRAINE VIVIAN CANTABELL, OF WQICHITA, KANSAS.

FLUID-PRESSURE GAGE.

Specication of Letters Patent.

Patented Nov. 13, 1917.

Application tiled April 18, 1916. Serial No. 91,959.

To all whom t may 'concer-n.'

Be it known that I, LDRRAINE V. CAN- TRELL, a citizen ot the United States, and a resident of Wichita, in the county of Sedgwick and State of Kanas, have invented a new and improved Fluid-Pressure'Gage, Iof which the following is a full, clear, and eXact description. v

Among the principal objects which the present invention has in view are: to promeans for automatically determining the supply of fluid to accord with the pressure in the receptacle therefor; means for pre-arranging the condition under which the apparatus operates; and to provide a simple and eiiclent mechanism for accomplishing the purposes above mentioned.

Figure l is a longitudinal sectional view of a gage constructed and arranged in accordance with the preferred embodiment oi the present invention;

Fig. 2 is a top view of the same;

Fig.. 3 is a cross section taken as on linel 3-3 in Fig. 1;

Fig. 4 is a longitudinal section of a gage constructed and arranged in accordance with a modified form of the present invention;

Fig. 5 is a top view of the gage shown in Fig'. 4; y

Fig. 6 is a cross section, said section being taken as on the line 6 6 in Fig. 4;

Fig. '7 is a detail view on an'enlarged scale, showing, in longitudinal section, the piston head with which theplunger used in the gage is provided.

Description.

disposition over and upon a valve for the introduction of air tothe inner tube of a pneumatic tire. The tube 9 is divide f ntrally by a partition ring 16 fixedly held in said tube. The ring 16 forms a guide and support for an inner tube 18 slidably mount-` ed therein. The tube 18 is supported at the rear end, by a collar 32, and centrally by the slidin block 26 with which it is rigidly The block 26 is movable lengthwise inthe tube 9, and isixed yin its ad.

justed position thereon means of a screw 30. The screw 30 is threadedly engaged with the block 26 and freely passes through to provide pounds. I

a clamping plate 25 and a slot 27,furnished 1n the tube.9. A

f When the screw 30 is released theblock 26 and the tube 18 mounted thereon 1s ad- 'Justable lengthwise of the tube 9, carrying 'with the block the vnipple 33 provided to receive in holding relation an air sup'ply pipe 35. v

Within the tube 18 are slidably mounted a piston valve 19- and a closure plug 20, the said valve and plug being' ixedly mounted on a hollow tube 37. The plug 20 closes the end of the tube 37 with which it is connected, to prevent the-air admitted into the said tube by the elongated slots 38, escaping' at the rea-rend thereof. The forward end of the tube 37 is open lwhere the said tube .passes through the piston 21 whichhas'a vsliding fit with the tube 9.-

The piston 21, tube 37 and parts connected therewith are normally held in an advanced position by a spiral compression spring 23. The spring 23 is held between the piston 21 and the collar or partition ring 16. The spring 23 is compressed when the` air pressure in the nozzle 10 and the pneusov matic tire connected therewith exceedsthe expansive force of said spring.v As in similarly constructed sprmgs, the expanswe force compression being ascertained in The calibrations or markings inare disposed at the degree ot dicative of said pressure, side of the slot 27, as seen the drawings.

To register with the calibrations referred to, pointers 39 are provided on the `plate 25 in line with the center bore of the nipple 33. The \bore of the nipple 33 is closed by the piston. valve 19 when the same is moved across the path of the bore and in corres ondence with the` movementof the tube 3g and piston 21 connected therewith.

Thus in ,ll be seen that in the .operation of the gale ,df the calibrations correspond in poundratio with the resistance of the spring 23, the block 26 may be adjusted to move the nipple 33 until the pointers 39 thereon register` with the calibrations at the side of the slot 27 in correspondence with the pressure regulating the delivery of the air through the nozzle 10. That is to say, to deliver air until the pressure in the pneumatic tire registers eighty; pounds, then the screw 30l is released and the block 26 and nipple 33 thereon is moved toward the rear best in Fig. 2-of if it is desired increases as the sprmg 1s compressed, the

end of the tube 9 until the pointers 39 register with the calibration mark 80.

During theubove described movement of the block 2G and parts connected therewith, the,spring 23 is maintained the previous position of the piston 21, valve 19 and parts connected therewith, or, in other words, the bore of the nipple 33 has been proportionally removed from the valve 19.

When, now, air is admitted to the tire through the nozzle 10, the pressure of the air being delivered on the face of the piston 21, will have to compress the spring 23 until the piston valve 19 is moved backward to cover the bore of the nipple 33. This requires eighty pounds of pressure exerted upon the piston/21;

' "'Modicaaon.

In the modied form of the invention shown in Figs. 4 'to 7 inclusive, to one end of the tube 9 is secured the nozzle 10, by means of a gland nut 11, said tube having a machine-faccd Harige 12, to hold the packin 13 inserted between the said tiange 12 an the corresponding flange 14 on the gland nut. The packed delivery nib 15 is rovided for fitting over the va'lve stem of t e pneu matic tire tube for the lling of which the gage is particularly des gned. The tube is longitudinally divided by the partition ring 16, which is centrally bored and held in place by screws 17 or other suitable fastening devices.

The partition ring 16 forms a sliding support for the inner tube 18, which affords a sliding support for the valve 19 and plug 20. The valve 19, are coaxial and rigi ger rod 22.

Interposed between Athe ring 16 andthe rear face of the piston 21, is the coiled compresssion spring 23, which normally moves the piston 21 to rest against the abutmentQA adjacent the connection of the tube 9 and nozzle 10. It will be understood that in (plug 20, and piston 21 ly mounted on a pluri ,service the spring 23 is normally under tension, to be initially moved by a. known pressure. As shown in the accompanying drawings, this pressure would be thirty pounds, as indicated by the forward edge of the sli plate 25 registering with the calibration designated by the numeral 30, The plate 25 is supported on the sliding block 26, ii which the tube 18 is rigidly held to move therewith. The block 26 is To this end, lateral extensions 28 and 29 are fitted to said slots, the former being rigidly connected to the plate 25, which, vas shown best in Fig. 5 of the drawings, overlaps the edges of the upperslot27, and is used to clamp the block in position whenever the screw 30.is tightened to clamp said plate upon the tube 9.

ided lengthwise of the tube 9 by slots 27 oriiied therein.

block, and pipe contained therein, are bored' to provide suitably reduced coaxial passages.

valve, the operator grasping the tube 9 as a handle, presses the nib over the .inlet valve of the tube of a pneumatic tire. The spring 23 operating normall to hold the piston 21 against the abutmen 251 and the valve 19 removed from the passages in the nipples 33 and 34, air or other iiuid is transmitted from the supply pipe 35, through the tube 18 at the rear of the valve 19, through the tube 37 or pipe 36, to the nozzle 10, and thence to the pneumatic tube, on the valve of which the nib 15-is pressed.

When the pressure in the pneumatic tube and in the nozzle 10 is greater than the re sistance of the spring 23, the saine is compressed, the fluid in the nozzle 1() moving the piston 21, tube 37` or rod 22, and valve 19 backward until the said valve covers the ends of the passages in the nipple 33,

or 33 and 34, thereby suspending the supply of air to the nozzle 10.

Prior to pressing the nozzle 10 upon the tire valve, the operator adjusts the block 26 and the plate 25 thereon, upon the tube 9,

and in accordance with the calibrations at the edge of the slot 27. Thus, if it be desired to supply the pneumatic tube with air or fluid up to a pressure of eighty pounds, the screw 30 is manipulated to release the plate 25 from its grip'on the tube 9, and the block 26 is moved toward the rear end of the tube 9 until the registering edge of the plate 25 or pointers 39 corre sponde with the calibration indicad by the automatically when the pressure introduced in the tube arrives at thatindicated by the plate 25 and the calibrations on the tube 9,

the supply ofair orluid will be determined. Claim.

VA fiuid pressure gage comprising a deliver nozzle; :i tube supporting said nozzle and laving a hollow nipple extending laterally therefrom; a valve recipro'cntively mounted in said tube ada 'ted to close the entrance of said nipple t ereto; a piston reciprocatively mounted in said tube adjacent said nozzle, the face of said piston be ing exposed to the pressure in said nozzle and relatively larger than the area of said valve; means rigidly connecting s aid piston and said valve; a connection plpe opera- A tively uniting said nozzle and the end of said tube opposite that with which said nozzle is engaged, one end of said pipe being disposed in the path of said valve to be closed thereby; a spring for normally maintaining said -valve between said nipple and said nozzle, said spring being adapted to yield under pressure applied upon said piston to move said, valve in closed relation to the opening of said pipe to said tube; and

' means for` moving said nipple relatively to the normal position' of said valve for varying the extent of movement/,of said valve' `preliminary to closing the entrance to said nipple.

LORRAINE VIYIAN CANTRELL.

,Witnessesi U. G. CHARLES, ANTON BERN. 

